Drilling machine



Aug. 28, 1928.

T. H. DOAN, JR

DRILLING'MACHINE Filed Nov. 27, 1925 Patented Aug. 28, 1928.

UNITED STATES PATENT OFFICE.

THEODORE H. DOAN, JR., F CLEVELAND HEIGHTS, OHIO, ASSIGNOR TO FOOT-BURT COMPANY, .A CORPORATION Ol." OHIO.

DRILLING MACHINE.

Application tiled November 27, 1925. Serial No.71,556.

The present invention relates to drilling machines, and is particularly well adapted for use in connection with what are termed usually high-duty or heavy-dutyv drillin machines, alt ough itis not limited in use t ereto In connection with high-duty drilling machines, it is important that the frame and work table be very rigid for if there is any spring action in either the frameor the table, then when the machine is subjected to heavy feeding pressure the drill will bind in the hole thereby greatly increasing the power required to drive the drill. This is especially true if the hole is a long one. Also, if the drill binds in the hole, the increased friction expands the drill thus causing it to bind still more ti htl which may resu t in the breaking of t e rill.

One object of my invention is to provide an improved drilling machine wherein the frame and table are very rigid but wherein, at the same time, the drilling machine does not become unduly large and heavy.

Another object of m 'invention is to provide in a drillin mac ine an improved arrangement for ta kcare of the chips and the drilling compoun or substance and conveying it awa A. further object of my invention is to rovide an improved drilling machine whic is comparatively narrow 1n width whereby when a number of machines` are set side by side, the spindles will'be brought comparatively close together. This is of importance because often one operative operatesseveral machines and it is desirable that the spindles be as close together as possible in order that the operative may be required to walk the minimum distance in moving from one machine to another.

A still further object of my invention is to provide a drilling machine of a structure such that several or. any desired number of machines ma be bolted together to form a complete rigid7 installation which will occupy a minimum amount of floor space.

For what I believe to be novel and my invention, attention is directed tothe following description and the claims appended thereto.

v In the drawing, Fig. 1 is a perspective view of two drilling machines embodying my invention,-the saine being placed side by' side and bolted together, and a portion of a. wall of one of the machines being broken away to show the structure behind it; Fig. 2 is a sectional view in perspective of the base of one of the machines shown in Fig. l; 3 is a sectional view of the base of one of the malc)h1nes, and Fig. 4 is a top plan view of such ase.

Referring to the drawing, 1 indicates a base which rests on a fioor and comprises side walls 2, a front wall 3, a rear wall 4, a bottom wall 5 and a top wall 6. This forms what I term a cabinet or box. The walls of the cabinetare of suitable thickness and they are provided with webs or braces 7, the whole going to make up a st-ructure which is strong and rigid. The topl wall 6 slopes downward from the front to the rear as is best shown in Figs. Q'and 3. It is provided at the front and sides with flanges 8 and 9 which project above it, the iianges 9 extending to the rear end of the top wall. At the forward end of top wall 6 is an upward projection l() which has a iiat top surface 101.l This forms the table of the machine. The top surface of table 10 is about ilushwith the top edges of iianges 8 and 9. At the rear of table 10 is a second projection 11 having an inturned bolting flange 12. This-projection 11 I term the upright support.

Table 10 is spaced from flange 8 so that there is formed between them a transverse groove 13. AThe portion of top wall 6 which forms the bottom of groove 13 is shaped so that the bottom of groove 13 ishighest at its center and slopes downward both ways. This is seen best in Fig. l where flange 8 is brokenm away on one of the machines. Table 10 and upright support 11 are spaced from side flanges 9 to provide side grooves 14 which at their forward ends merge into transverse groove 13. Table 10 and upright support 11 are spaced apart to provide a transverse groove 15 between them which at its ends opens into side grooves 14. The portion of top wall 6 which Jforms the bottom of groove 15 is shaped so that it is highest at the center p gether with and slo es downward both ways as is seen best in *igs 2 and 4. Thus it will be seen that table 10 is surrounded by grooves, all of which slope in directions to carry the cutting compound and chips to the rear of the machine. A,

llounted n support l1 is ah upright 16, the same being provided with an internal' flange or other suitable means 17 which is bolted to flange 12. Bolted'to the upper end of upright 16 is a head 18 which carries the drill spindle and other operating parts: This portion of the machine is illustrated only in,

outline as its specific structure fornis'nopart of the present invention. u v y lThe cabintlo'r box which forms' thehase is rectangular 'and side walls 2are jstraight and fiat. At ltheir forward and rear 1edges, side walls 2 pjet beyondfront 'wall 3 and rear \'v'a1l"4y to provide flanges 19 in whichare slots openings 20 adapted to receive bolts forlfastening'together two o'r more drilling machines. `In Fig. 1, two machines `are shownJ arraned side by side and a'stened toolts -21. i The machine is operated in the usual maner, tl'ife pieceftoq be worked'upn being placed on table 10. The chipsfaiid cutting compolind ru'u'n into grooves 13, 14 and 15 and then down 'grooves 14 'to' therear of the inachih'e where they may be caught in a suitable receptacle or trough. The pitch of the grooves 4is L'made great4 enough so that the compound will carry theehips down them. With this arrangement, it will be' seen that I provide a means whereby the chips and compound are'carried away to the rear ofthe in'achiiie in a niostsatisfactory manner, and that -I accomplish this result without adding materially to the `width of the machine.

Byproviding 'a rectangular base in the l fr'm of a cabinet or box, I provide a very stilll rigid su'pport' fo'rthetable and for the upri" ht and head'of ythe machine. Thus I Aprovi ey a 'drilling Amachine not likely to spring yunder heavy load. At the saine time, I p'rovidea structure which need not beinade very heavy in order to give it the desireddegr'e'e of rigidity. Y 'ilnydesired number" of machines may be placed side by side vand be bolted together after the mannrillu'strated iii Fig. 1. When this is done, a continuons rigid'base structure is provided and the'drill spindles are brought close tdgeth'er. There results also a rigid group of machines each having ineans `for conveying the cutting compound and chips to its rear. When several machines are thus assembled side by side, I may providewith advantage a trough'which extends alongthe back of the 1Iriacliiiles underthe lower edge of top wall 6 to catch thechips'and compound from 'all the machines and convey it Aaway.

By providing an internal langelQ on lip- .riglit'siipport 11, yrather than' an outturne'd means.

4cipl'e 'of "operation of my. invention, together with theapparatus which I new consider to #represent tliebest `embodiment thereof, but

I desire `to have it understood that the apparatus'shown is only illustrative and that the invention may be carried out by other What I claim as new and desire,to secure by Leners Patt'fuie UnitedStates, 1

1. In 'a 'drilling"`iii'achiii`e, fthe' combination of a base comprising 'side`wa1lsf-'nt wall, a 're'ar wall andai tlovviiiardl "ndieai'w'idly slo'ping'top vv'all, said "side wai'ls'aiidrot wall having extensions whichproject above the "top surface lof the t'p'd', iiiall "to 'provide a surrouiiding'flange, projection on the top wall which I.plivids 'a' table lfor lthe' i'riachiiie,

jeetion and upright fsii'pp'rt "being troni saidy surrounding flange to, provide grooves which I'slope t'oward'the back' of, the

machine for carrying fa way chips and 'cutting wall having lextensions 'ivliiel'ilproj'e'ct above the -top surface of the top wall'to provide a surroundii'igiflanffe, a projection Eon thel'to'p wall which provi es'a table for 'the'iia'cl'rin'c, and an upright support'oi'i'tlie top ivalhfsaiil projection and upright supportbei'ng spaced from Asaid surroiindihv flange 'and from' each other to provide 'grovesfor *cart ihgavay chi'psand cuttingjsiibstnde, the rveslhetween the prOc'ltionand1 the iight and be# tween the projection'afdf'the `ont Ail'all extension sloping downwardly "onto the 'rezirL wardly sloping top wall.

a A unitary f drilling machine guerrera adapted for use witl'ijot change eitlieib'y itself` or in a battery of 'similar 1nach'ies,`sai'd structure comprising "a ba'se haviiigliiit sille walls, a front wall, a rear ivall":n"d"a rearL wardly Vand "downwardly sloping tp"`wall which "overhangs therear wall, said sidewalls projecting beyond the front ivail at their front and Arear edges 'to provide bolting flanges for use in 'astenin' al'pll'irality lof machines togetheif,`a`rid :sai'isidc walls'and front wall `projecting above `'the to 'wall to lio lila

itin

the top wall which provides Ba `table 1llo'rftli'e machine and a second projection at the rear of the first named projection which provides a support for an upri ht, said rojections being spaced from sal-ig surroun ing `flange I to form grooves for carrying away chips and cutting substance, and said sloping top wall being adapted to deliver chips and cutting substance to the rear of the machine and to a receptacle in common with other similar ma.- chines.

In witness whereof, I have hereunto set my hand this 2l day of November, 1925.

THEODORE H. DOAN, JR. 

